Form for concrete construction.



H.J.BAKER. I FORM OR CONCRETE CONSTRUCTION.

IIVI/ENTOI? Hugh/f @JVKEE A TTOR/VE V5 H.J.BAKER.

FORM FOR CONCRETE CONSTRUCTION.

APPLICATION FILED SEPT. 23, 1915- Lgggfiwu Patented Apr. 10', 191?.

2 SHEETSSHEEI 2. l Z 27 /4 Q /A VA 7 Z2 /WWMQ ATTORNEYS HUGH J. BAKER, or INDIANAPOLIS, INDIANA, ASSIGNOR 'ro THE concnnrn roams company, or INDIANAPOLIS, rnmanaa conronarron.

FORM FOR CONCRETE CONSTRUCTION.

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Specification of Letters Patent.

Patented Apr. 1(1 191?.

Application filed September 28, 1916. Serial No. 121,869.

To all whom it may concern:

Be it known that I, HUGH J. BAKER, a citizen of the United States, and a resident of Indianapolis, county of Marion and State of Indiana, have invented a certain new and useful Form for Concrete Construction; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

The object of this invention is to provide an improved form for making concrete slabs, flooring or the like, in such manner as to eliminate the regular slab forming and thereby reduce the cost of making cellular or ribbed floors by reducing the weight, the concrete quantity required, and the reinforcing steel quantity required as well as reducing the cost of the form constructlon itself.

One feature of the invention consists in combining removable metal covered trussed wood cribs with concrete beam forms. Heretofore in such flooring either clay tile, steel tile, plaster block or Wood forms have been inserted and built in concrete flooring and the like for purposes well known to those skilled in the art. These inserted members or parts have been left inthe flooring so as to greatly. increase its weight without any return advantage, or removed at considerable cost and disadvantage. In this present invention these inserted members, such as clay tile, steel tile, plaster block or Wood forms, are not employed at all and, therefore, are not in the flooring, but instead of them there is used trussed wood cribs covered with plain smooth sheet metal and of such form that after the concrete flooring is set, the cribs are removed, thus leaving the flooring or slab reduced in thickness and weight and thus greatly reducing the expense or cost.

These cribs are used in combination with wood forms for girders and T-heads and, therefore, this construction eliminates all but the shoring of the slabs. These trussed cribs are used over and over again indefinitely and they are very light and can be removed from the concrete quickly and without damage to the concrete and they will not warp or get out ofshape because the are made of a number of pieces of wood an covered with metal. The sheet metal covering gives to the underside of the slab or floor- Ing a smooth pleasing surface. Because of the trussed design of these cribs they are self-supporting over long spans.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

;In the drawings, Figure 1 is a perspective view of the form construction for building concrete flooring, and a portion ofthe concrete flooring, the remainder being broken away. Fig. 2 is a vertical section on the line 2-2 of Flg. 1, and the lower parts of the supports. Fig. 3 is a perspective view of a crib without any metal covering thereon. Fig. 4 is a section on the line 4-4.- of Figs. 1 and 2, parts of the structure being broken away. Fig. 5 is a perspective view of a splice.

In Fig. 2 the concrete slab or flooring 10 is shown, the same being largely broken away in order to uncover the mold or form construction upon which said slab or flooring is formed or made. In this slab or flooring construction, all parts thereof are formed of concrete, including the girders and the intervening spans. The mold or form construction is as follows:

Upon mud sills 11 or other suitable foundation, shores 12 are erected, and usually there is a wedge between the sill and the lower end of the shore. For forming the concrete girders 13 and T-heads 14 the mold or form 15 is provided which rests upon cross bars 16 on the upper end of the shores 12 and said cross bars are secured in place by braces 17. The mold or form 15 for the girders and T-heads is held in position by uprights 18 and 19 upon the bars 16 and the upper ends of the uprights 18 and 19 are secured by cross bars 20. Runners 21 are mounted on the uprights 18 connected with the girder mold construction, as shown in Fig. 2. There are also runners 22 parallel with the runners 21 and located upon the upper ends of the shores 12 which are located between the series of shores supporting the girder frames. Upon said runners 21 and 22 and transversely thereof wooden cribs or skeleton frames 25 are mounted. In the forms shown in Fig. 2 there are two of these cribs in alinement with each other between the two girder constructions and the adjacent ends of the crib are connected by splices 26 which are formed somewhat similar to the cribs, that is, of wood in skeleton form. These cribs taper upwardly somewhat and their tops, sides and ends are covered with a plain smooth sheet metal covering 27, as seen in Fig. 4, and the splicing cribs or frames 26 are covered with a similar metal plate covering 28, as seen in Fig. 5. These cribs are associated adjacent each other, as shown in Fig. 4, and have laterally extending flanges 29 along the lower portion of each end so that when adjacent each other, as shown in said figure, there is left a space between them for forming a joist 30'of concrete which reaches from one T- head 14 to the next.

When the mold or form construction is erected as desired, concrete is introduced thereon and it forms the girders 13, T-heads 14, joists 30 and slab or flooring 31, as seen in Figs. 2 and 4, all of said parts of the flooring being integral.

It is understood that the girders are supported at intervals by columns, walls or aids to the strength ofthe flooring. On the contrary they weight the flooring and add.

materially to the cost.

These-cribs and splices and other parts of the molds or forms are of staple size and after removal, are taken to another place and again used and they may be used indefinitely in building flooring in this'fashion. The cribs are very light because of their-skeleton construction and being made of therefore, the cribs will not swell out or shape. While the invention herein shown is Y formed to' make a concrete flooring, still it is not limited to such use, but may be used in fiiaking concrete slab constructions gem era y.

The invention claimed is: a v.

A mold construction for making concrete flooring and the like including trussed cribs, sheet metal coverings therefor, said cribs being tapered so as to be readily removable from the concrete after it is set, and laterally extending flanges on the lower portion of each of said cribs, said flanges being adapted to abut the'fianges of the adjacent cribs so as to form a self-supporting bottom for the concrete formed therein.

In witness whereof I have hereunto aflixed my signature.

HUGH J. BAKER. 

